package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.apache.ibatis.annotations.Update;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeedto) {
        Employee em = new Employee();

        //属性拷贝（要求拷贝对象- employee 中所有属性在目标对象- em 都找得到且名称一致）
        BeanUtils.copyProperties(employeedto,em);

        //使用状态常量设置状态属性
        em.setStatus(StatusConstant.ENABLE);

        //对用户密码设置，同样使用md5加密方式插入数据库
        em.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));


        em.setCreateTime(LocalDateTime.now());
        em.setUpdateTime(LocalDateTime.now());

        // TODO 获取当前管理员身份
        em.setCreateUser(BaseContext.getCurrentId());
        em.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(em);
    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeepagequerydto) {
        PageHelper.startPage(employeepagequerydto.getPage(), employeepagequerydto.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeepagequerydto);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total, records);
    }

    @Override
    public void startORstop(Integer status, long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();

        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("********");
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }
}
